rtc: BKL pushdown

#include <linux/proc_fs.h>

#include <linux/seq_file.h>

#include <linux/spinlock.h>

#include <linux/smp_lock.h>

#include <linux/sysctl.h>

#include <linux/wait.h>

#include <linux/bcd.h>

 * needed here. Or anywhere else in this driver. */

static int rtc_open(struct inode *inode, struct file *file)

{

	lock_kernel();

	spin_lock_irq(&rtc_lock);

	if (rtc_status & RTC_IS_OPEN)

	rtc_irq_data = 0;

	spin_unlock_irq(&rtc_lock);

	unlock_kernel();

	return 0;

out_busy:

	spin_unlock_irq(&rtc_lock);

	unlock_kernel();

	return -EBUSY;

}